Oxygen vacancy induced Pt-decorated MOF photocatalyst for hydrogen production |
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| Affiliation: | 1. National Engineering Lab for Coal-fired Pollutant Emission Reduction, School of Energy and Power Engineering, Shandong University, Jinan 250061, China;2. School of College of Vehicle and Traffic Engineering, HeNan University of Science and Technology, Luoyang 471003, HeNan, China;3. University of Chinese Academy of Sciences, Beijing, 100049, China;4. Zhejiang University, Hangzhou, 310027 PR China;1. Institute of Thermal Engineering, Technische Universität Bergakademie Freiberg, Freiberg, Germany;2. Technical University of Darmstadt, Department of Mechanical Engineering, Simulation of Reactive Thermo-Fluid Systems, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany;1. School of Energy and Materials, Shanghai Polytechnic University, Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai 201209, China;2. Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China;3. College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, China;4. School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China;5. Department of Materials Science and Engineering, Drexel University, Philadelphia 19104, USA;1. College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang, 414006, China;2. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an 710049, China;3. Shenzhen Gas Corporation Ltd., Shenzhen 518040, China;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;3. Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Institute of Optoelectronics, Department of Materials Science, Fudan University, Shanghai 200433, China |
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| Abstract: | The photocatalytic performance has remained challenging due to the rapid recombination of photoexcited electron-hole (e-h) pairs. To overcome this problem, creating oxygen vacancies on the surface of semiconductors has been an effective strategy. Herein, we report the effects of oxygen vacancies (Ov) on photocatalytic HER performance of Pt nanoparticles (NPs) anchored on UiO-66-NH2. In contrast, under the same amount of Pt NPs, UiO-66-NH2 with high oxygen vacancies (denoted as Pt/UN-Ovh) exhibit superior photocatalytic H2 generation than the catalyst with low oxygen vacancies (denoted as Pt/UN-Ovl) under visible-light irradiation. Based on the experimental characterization and theoretical calculations, the high oxygen vacancies not only stabilize the Pt NPs on the substrate (UiO-66-NH2), but also develop the strong interaction between Pt NPs and support thereby Pt NPs traps more electrons from substrate and provides protons for H2 production inhibiting the electron-hole recombination. This work provides novel strategy for enhancing the photocatalysts performance of MOF based materials. |
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| Keywords: | Pt nanoparticles Oxygen vacancy Metal-organic framework Photocatalysis Hydrogen evolution |
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